Slip joint

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 19/09 (2006.01) E21B 17/01 (2006.01) E21B 17/07 (2006.01) E21B 17/08 (2006.01) E21B 19/00 (2006.01)

Patent

CA 2252787

A slide joint (10) for a riser (16) between a well and a floating petroleum installation, e.g., an oil platform, comprising an outer pipe (12) and an inner pipe (11), which pipes are adapted to move telescopically relative to one another to compensate for changes in the distance between the sea bed and the platform. The inner pipe (11) is connected to a piston (27), which piston is responsive to actuation by hydraulic pressure in order to provide tractive force on the riser (16). The outer diameter of the inner pipe (11) is adapted to the diameter of the outer pipe (12) so as to form an annulus (25) between the pipes. The piston (27) is fixedly connected to the inner pipe (11) at or near the downward oriented end thereof, said annulus (25) above the piston (27) being subjected to hydraulic pressure. Below the piston (27) is provided a protective sleeve (29), which is slidably disposed within the outer pipe (12).

Un joint (10) coulissant pour colonne montante (16) entre un puits et une installation pétrolière flottante, par exemple une plateforme pétrolière, comprend un tube extérieur (12) et un tube intérieur (11), lesquels tubes sont adaptés pour se déplacer de façon téléscopique l'un par rapport à l'autre afin de compenser les échangements de distance entre le fond de la mer et la plateforme. Le tube intérieur (11) est relié à un piston (27), lequel piston réagit à un actionnement par pression hydraulique afin d'exercer une force de traction sur la colonne montante (16). Le diamètre extérieur du tube intérieur (11) est adapté au diamètre du tube extérieur (12) afin de former un espace annulaire (25) entre les tubes. Le piston (27) est relié de manière fixe au tube intérieur (11) au niveau ou près de son extrémité orientée vers le bas, ledit espace annulaire (25) au-dessus du piston (26) étant soumis à une pression hydraulique. Au-dessous du piston (27) se trouve un manchon protecteur (29), lequel est disposé coulissant à l'intérieur du tube extérieur (12).

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